一起甲型副伤寒疫情流行因素的病例对照研究
A case-control study of the epidemic factors of an outbreak of paratyphoid A
-
摘要: 目的查明导致甲型副伤寒流行的因素,以制定有效的防制措施,控制疫情,并为以后的防制工作提供依据。方法采用1∶3配比的病例对照研究,对某镇共31例病例和93例对照进行问卷调查,计算比值比(OR),及OR的95%可信区间。结果单因素分析结果显示,使用河水的OR值为3.12,病例组和对照组差异有统计学意义(!2=4.50,P﹤0.05),使用河水是引起此次副伤寒局部流行的因素。结论由于该镇为伤寒、副伤寒老疫区,村民日常使用污染河水为引起此次副伤寒流行的主要因素。有关部门应加强水质监测,保证自来水的供应,确保居民能用上清洁卫生的生活用水。Abstract: Objective The present study was conducted to ascertain the epidemic factors of paratyphoid A for the effective prevention and control of the epidemic．Methods A questionnaire investigation was done among 31 cases of paratyphoid A and a control group of 93 normal subjects involved in the 1 to 3 proportional case-control study．The odds ratio (OR)and itS 95％ confidence interval (CL) were calculated．Results The single-factor analysis showed that the OR value was 3.12 among those using river water with a statistically significant difference between the study group and the control group (X2=4.50，P<0.05)．It was believed that the local prevalence of paratyphoid was caused by using river water．Conclusion The use of the polluted river water was the main factor contributing to the prevalence of paratyphoid among the villagers．The surveillance of water quality is to be taken seriously by the authorities concerned to guarantee the supply of pipe water，making sure that the residents are provided with clean and sanitary drinking water．
下载: